Gage-cock.



W. A. DITTMER.

GAGE COCK.

APPLICATION FILED MAR. 31, 1913.

1,080,426. Patented Dec. 2, 1913.

I II," I

i n! I lhif all 10 7 e avwentoz WILLIAM'A. DITTMER, OF TEKOA, WASHINGTON.

GAGE-COCK.

Specification of Letters Patent.

Patented Dec. 2, 1913.

Application filed March 31, 1913. Serial N0. 758,032.

To all whom it may concern:

Be it known that I, IVILLIAM A. DrrrMnn,

a citizenof the United States, residing at Tekoa, in the county of Whitman and State of lVashington, have invented certain new and useful Improvements in Gage-Cocks and I do declare the following to be a full, clear, and exact description of the invention, such as will-enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in ga e cocks.

)ne object of the invention is to provide a gage cockhaving interchangeable handles whereby the same may be readily operated when applied to boilers having different steam pressures.

Another object is to provide a gage cock having a self grinding valve which maybe readily operated for grinding the valve seat a without removing the pressure from the boiler.

A further object is to provide a gage cork constructed in such manner that the same may be readily cleaned while the boiler is under full pressure.

Still another object is to provide means whereby should the valve be broken off in the boiler the stem of the valve cannot be blown out.

WVith these and other objects in view, the invention consists of-certam novel features of construction and the combination and arwith a different form of valve operatinghandle from that shown in Figs. 1 and 2 of the drawings.

referring more particularly to the drawings, 1 denotesthe main body portion or barrel of the cook the inner end of which is threaded and adapted to be screwed into a der 4, said reduced outer end being exterior-1y threaded as shown. The outer end of the passage 2 is preferably flared as at 5 for a purpose hereinafter described.

Adapted to be screwed onto the reduced threaded outer end of the body 1 is a cap or bonnet 6 having an extension 7 provided on its outer side with coarse threads 8 and having in its outer end a packing box 9 in which is screwed a gland 10 by means of which a steam tight joint is formed around the valve stem of the cock hereinafter de-v scribed. Formed in one side of the hollow interiorly threaded inner end of the bonnet 6 is an interiorly threaded discharge passage -11 with which is connected a discharge spout or nipple 12.

Operatively engaged with the valve seat 3 in the inner end of the body of the cock is a valve 13 which isarran ed on and preferably formed integral witli the inner end of an operating stem 14 which projects through and has a sliding revoluble engagement with the bore 2 in the body of the cock and with the bonnet 6 and packing gland 10 thereon. In the stem 14 of the valve are a series of longitudinally extending discharge grooves or channels 15 which extend from the valve to a point slightly beyond the inner end of the body, 1 and which open at their outer ends in the recessed or hollow body of the bonnet as shown. The outer end of the stem 14: is reduced to form a shoulder 16 which is disposed at short distance from the end of the recessed body portion of the bonnet 6 and which serves as a stop to prevent the stem of the valve from being blown out of the cock should the valve 13 be broken off from 1s further reduced and squared as at 17 to receive the valve operating handles of the cock which will be hereinafter more fullydescribed.

In Figs. 1 and 2 of the drawings, the cock is shown as having a handle 18 in the form of a circular disk having. its outer edge ser rated or roughened and having formed in its inner end a socket 19 provided with coarse interior threads adapted to be engaged with the coarse threads 8 of the extension 9 of the bonnet whereby said handle may be readily screwed inwardly or outwardly in said extension of the bonnet. In the handle 18 is formed a rectangular passage 20 the outer end of which is connected with or terminates in a circular socket 21, into which the squared .end 17 of the. valve stem projects. In the squared end 17 is a threaded socket 22 adapted to receive a stop screw the head of which projects beyond the sides of the squared portion 17 and forms a stop to prevent the handle 18 from becoming disengaged from the stem of the valve when said handle is unscrewed from the threaded end of the bonnet and whereby said handle is held in operative engagement with the squared end 7 of the valve stem to permit the stem and valve to be turned first in one direction and then the other by the handle for the purpose of grinding the valve against its seat and thereby cleaning and renewing the surface of the seat.

By reducing and squaring the outer end of the valve stem 1% a shoulder Ql isformed, said shoulder being adapted to be engaged by the end of the interiorly threaded socket of the handle when the same is screwed inwardly on the threaded extension? of the bonnet whereby the stem of the valve is forced inwardly and thevalve thus opened or disengaged from its seat to permit the discharge of steam from the cock. \Vhen the handle is thus turned in a reverse direction or unscrewed on the threaded extension 'of the hood, the'pressure of the steam within the boiler will immediately close the valve as will be readily understood. \Vhen the handle is entirely unscrewed from the threaded extension 7 the handle will be supported on the squared inner end of the valve stem and may then be operated to turn the valve stem and valve back and forth for grinding the valve seat as hereinbefore described. It will be noted that the shoulder 16 on the'stem of the valve is placed some distance from the end of the threaded socket in the bonnet 6, said space being provided to allow for the wearing of the valve and valve seat, thus preventing any possibility of the shoulder interfering with the-closing of the valve after the latter and its seat have become worn.

The cock as herein-before described and as shown in Figs. 1 and 2 of the drawings is designedfor use in connection with high pressure boilers in which the pressure of the steam is too great to permit the valve to be pushed open by directhand pressure. .lVhen, however the valve is to be used in connectionwith low pressure boilers wherein the valve may be readily opened by direct hand pressure the necessity of providing a handle ha'vingan operating thread is obviated and in place of such a handle the stem of the valve may be simply provided with an operating knob or handle 25 as shown in Fig. 5 of the drawings and which i is secured to the squared outer end of the valve stem the screw 23. Thishandle 25 ing the same or releasing the. pressure from 1,oso,4.2e

simply serves as a convenient means for gripping the valve stem and forcing the latter inwardly and thereby disengaging the valve from its seat as will be readily understood.

By providing the valve with a bonnet which is detachably secured to the outer end of the body of the cock itwill b'seen that onremoving the bonnet G the grooves or channels 15 in the valve stem may be easilyclea'ned by inserting awire or other instrument therethrough said wire being readily engaged with the ends of the grooves through theflared outer end of the bore 2 in the body of. the cock. It will also be noted that this cleaning of the grooves 15 and the grinding of the valve .seat as hereinbefore described are bot-h accomplished while the cock is in use or without removthe boiler, or in other words. the. valve may be cleaned and ground while the boiler is under a full head of steam.

From the foregoing description takenin connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

, Various changes in the form, proportion and the minor details of construction may be resorted to without. departing. from the principle or sacrificing any of the advantagesof the invention 'as claimed.

Having thus described my invention, what I claim is:

a 1. A gage cock comprising a tubular body having in its inner end a valve seat, a. bonnet detachably engaged with the outer end of said body, a threaded extension on said bonnet having a passage therein arranged in line with the bore of said tubular body, a

valve engaged with the seat in the inner end of the body of the cock,,,a stein on said valve, said stem having a revolubleand sliding engagement with the bore in the body and with the passage in the extension'of the bonnet and having on its outer end a reduced squared handle engaging portion, a handleslidably mounted on said squared end of the said handle adapted to be screwed onto the threaded extension of said bonnet whereby said valve is forced open againstthe pressure of the steam in the boiler.

2. A gage cock comprising a tubular body having in its inner end a valve seat, a bonnet having a detachable engagement with the outer end of said body, an exteriorly threaded extension on said bonnet, a' valve to engage the valve seat in the inner end of said body, a valve stem revolubly and slidably engaged with said body and with the bonnet thereon, said stem havinga; squared outer end, a handle slidably mounted on said valve stem, a stop screwed in" said squared 11 5 end, and an interlorly threaded socket on squared outer end of the stem, an interiorly threaded socket on said handle and having a threaded engagement with the extension on said bonnet whereby when said handle is screwed inwardly on said extension the valve will be opened andmeans to prevent the disengagement of the handle from the squared extension on said stem when the valve on the handle is unscrewed from the threaded extension of the bonnet.

3. A gage cock comprising a tubular body having in its inner end a valve seat and having its outer end reduced and threaded, a bonnet having in its inner e d an interiorly threaded socket-adapted to be screwed onto the reduced threaded end of said body and forming a discharge chamber at the outer end of the latter, a discharge spoutconnected with said bonnet and communicating with said. chamber, a threaded extension on said bonnet and having therein a passage communicating with the socket in the bonnet and arranged in line with the boreof said tubular body, a stufling box and a packing gland arranged in the outer end of said threaded extension, a valve engaged with the seat in the inner end of the body of the cock, a stem on said valve, said stem having a revoluble and sliding engagement with .the bore on the body and with the passa e and stutfing boxin the extension of the onnet and having on its outer end a reduced squared handle engaging portion, a handle slidably mounted on said squared end of the valve stem, a sto sci'ew in said squared end and an interior y threaded socket on said handle adapted to be screwed onto the threaded extension of said bonnet whereby saidvalve is forced open against the pressure of the steam in the boiler.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. 7

WILLIAM A. DITTMER.

Witnesses:

H. G. LUoAs, F. R. Bi onr.

Copies of this patent may be obtained tor five cents each, by addressing the Commissioner of latents.

' Washington, D. 0. 

